山西省天龙山弃耕地的根系呼吸及其影响因素

王礼霄; 严俊霞; 李洪建; 李君剑

doi:10.13961/j.cnki.stbctb.2014.05.013

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山西省天龙山弃耕地的根系呼吸及其影响因素

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- 山西省天龙山弃耕地的根系呼吸及其影响因素
- Root Respiration and Its Affecting Factors in Abandoned Land in Tianlong Mountain Area of Shanxi Province
- 水土保持通报 2014年33卷第5期页码：29-33
- 作者机构：
  
  山西大学黄土高原研究所,山西,太原,030006
- 作者简介：
- 基金信息：
  
  山西省自然科学基金项目"环境因子对森林生态系统土壤呼吸时、空变异的影响机理"(2012011033-5);国家自然科学基金项目"陆地表面辐射温度对土壤呼吸的影响机理及其模型构建"(41201374)
- DOI：10.13961/j.cnki.stbctb.2014.05.013
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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王礼霄, 严俊霞, 李洪建, 等. 山西省天龙山弃耕地的根系呼吸及其影响因素[J]. 水土保持通报, 2014,33(5):29-33.

WANG Li-xiao, YAN Jun-xia, LI Hong-jian, et al. Root Respiration and Its Affecting Factors in Abandoned Land in Tianlong Mountain Area of Shanxi Province[J]. Bulletin of Soiland Water Conservation, 2014, 33(5): 29-33.
王礼霄, 严俊霞, 李洪建, 等. 山西省天龙山弃耕地的根系呼吸及其影响因素[J]. 水土保持通报, 2014,33(5):29-33. DOI： 10.13961/j.cnki.stbctb.2014.05.013.

WANG Li-xiao, YAN Jun-xia, LI Hong-jian, et al. Root Respiration and Its Affecting Factors in Abandoned Land in Tianlong Mountain Area of Shanxi Province[J]. Bulletin of Soiland Water Conservation, 2014, 33(5): 29-33. DOI： 10.13961/j.cnki.stbctb.2014.05.013.

摘要

用去除根系法对山西省天龙山自然保护区弃耕地的根系呼吸进行了为期2 a的研究。结果表明

弃耕地的根系呼吸速率具有明显的季节变化

与土壤温度的变化趋势相一致

夏季高冬春季低。2007和2008年3-12月的根系呼吸总量(以C计)分别为329.5和392.5 g/m

。土壤温度是影响根系呼吸速率的主导因子

可以解释根系呼吸速率季节变化的79%~88%

土壤水分对根系呼吸的影响较小。包括土壤温度和土壤水分两个变量的双因素模型可以解释根系呼吸季节变化的81%~89%;根系呼吸占土壤总呼吸的比例具有明显的季节变化

为24%~54%;2007和2008年3-12月根系呼吸比例的平均值分别为24.9%和30.9%。

Abstract

Using root exclusion method

and based on the field observation data of root respiration in a period of two years from an abandoned land soil in Tianlong mountain area of Shanxi province

we analyzed the relationships between root respiration and environmental factors. The results showed that the root respiration in the abandoned land exhibited a seasonal variation following the variation in soil temperature

with high values in summer and low values in winter. In terms of carbon content

the root respirations in 2007 and 2008 was 329.5 and 392.5 g/m2 from March to December

respectively. Soil temperature was a main factor influencing root respiration

and it could explain a variation of respiration from 79% to 88%. Soil moisture had little impact on root respiration. The model including soil temperature and soil water content variables could explain the seasonal variation of root respiration from 81% to 89%. The percentage of root respiration in total soil respiration changed over the season between 24% and 54%. Percentage of the mean root respiration from March to December in the total soil respiration in 2007 and 2008 was 24.9% and 30.9%

respectively.

关键词

Keywords

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